{"id":"EM-20261104-1RC6","url":"https://cyber.eventmonitor.net/incident/EM-20261104-1RC6/freerdp-vulnerability-cve-2026-121958/","type":"cve","title":"FreeRDP Vulnerability (CVE-2026-121958)","subtitle":"CVE-2026-121958","subject":"CVE-2026-121958","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-04T16:17:48.610Z","firstSignal":"2026-11-04T15:33:22.000Z","lastSignal":"2026-11-04T16:17:48.610Z","updated":"2026-11-07T00:59:45.971Z","revision":1,"life":[{"status":"Born","at":"2026-11-04T16:17:48.610Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-04T16:17:48.610Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T15:33:22.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-04T16:17:48.610Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261104-1RC6 created."}],"stages":[{"name":"Disclosed","at":"2026-11-04T16:17:48.610Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-04T16:17:48.610Z","detail":"CVSS 8.7 · EPSS 0.3%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-04T15:33:22.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-04T15:33:22.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":3,"title":"Red Hat: CVE-2026-121958 (important)","text":"freerdp: FreeRDP: Heap-based buffer overflow via surface key truncation in RDPGFX","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-121958.json"},{"at":"2026-11-04T16:17:48.610Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-121958 (CVSS 8.7)","text":"FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback truncates surface hash keys to 16 bits, leaving the surface table inconsistent so HashTable_GetKeys writes past its allocated key array. A malicious or man-in-the-middle RDP server can exploit this by creating surfaceId 0xFFFF, closing the RDPGFX channel, sending repeated DELETESURFACE PDUs, and then sending ENDFRAME or RESETGRAPHICS.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121958"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-04T16:17:48.610","score":8.7,"severity":"HIGH","desc":"FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback truncates surface hash keys to 16 bits, leaving the surface table inconsistent so HashTable_GetKeys writes past its allocated key array. A malicious or man-in-the-middle RDP server can…","product":"Freerdp","seen":1793917591435},"kev":null,"epss":{"epss":0.00303,"pct":0.23204,"at":1794013185971},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}